The diagonal relationship is due to similarity in ionic size and the ratio of:
ADensity to weight
BCharge to radius
CMass to volume
DProtons to neutrons
Answer & Solution
Correct answer: B. Charge to radius
1. Two properties of the ions are compared.
2. One is size and the other combines charge with size.
3. That is the charge to radius ratio.
_Source: NCERT Class 11 Chemistry Part II, Unit 10, The s-Block Elements._
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